A pyrotechnic week of geopolitical intrigue has yielded new clarity about the whys and wherefores of the Russia imbroglio, including one insight straight from Russian President Vladimir Putin.

Why did Putin order the campaign of "active measures" that have been directed against the United States and the West since before the 2016 election?

Updated at 12:10 p.m. ET

President Trump is getting a strong reaction after a Fox News interview in which he appeared to question the need to honor NATO's collective defense clause, while suggesting that newest alliance member Montenegro is a country of "aggressive people" who could trigger World War III.

A high school social studies teacher who fired a gun inside his Georgia classroom in February, hitting a window and alarming students and staff just days after the Parkland, Fla., shooting massacre, was sentenced on Tuesday to two years in prison, followed by eight years probation, according to Conasauga Judicial Circuit District Attorney Bert Poston.

Walter Carr didn't panic, he made a plan.

The Terminator's killer robots may seem like a thing of science fiction. But leading scientists and tech innovators have signaled that such autonomous killers could materialize in the real world in frighteningly real ways.

During the annual International Joint Conference on Artificial Intelligence in Stockholm on Wednesday, some of the world's top scientific minds came together to sign a pledge that calls for "laws against lethal autonomous weapons."

When people think of particle accelerators, they tend to think of giant structures: tunnels many miles long that electrons and protons race through at tremendous speeds, packing enormous energy.

But scientists in California think small is beautiful. They want to build an accelerator on semiconductor chips. An accelerator built that way won't achieve the energy of its much larger cousins, but it could accelerate material research and revolutionize medical therapy.

First of all, what is an accelerator?

Former White House press secretary Sean Spicer has words of praise for Sarah Sanders, his successor on the podium, and says she has figured out how to please President Trump in the job in a way he struggled to do.

"I think Sarah has done a great job of making sure that she understands what the president wants," Spicer told NPR's Mary Louise Kelly in an interview on Wednesday in advance of next week's release of his book The Briefing: Politics, the Press and the President.

More than a year after a landslide shut it down, a section of Highway 1 running along a coastal stretch in California's Big Sur region reopened early Wednesday.

The California Department of Transportation announced that the roadway at Mud Creek was opening about two months ahead of schedule, thanks to favorable weather and worker productivity.

"It's a big deal to open the highway unrestricted," Colin Jones, a Caltrans spokesman told NPR.

Updated at 3:50 p.m. ET

A federal magistrate judge ordered Wednesday that a Russian woman charged with being a Russian agent in the United States must be jailed ahead of her trial after prosecutors said she was a flight risk.

The woman, Maria Butina, has been in regular contact with Russian intelligence, the Justice Department says, and she attempted to offer sex in exchange for a position with an organization she targeted.

Updated at 6:47 p.m. ET

The White House is denying that President Trump believes Russia is no longer targeting U.S. elections and other infrastructure, despite his apparent answer to a reporter's question Wednesday morning.

Asked at the start of a Cabinet meeting whether Russia is still targeting the U.S., Trump shook his head and said "no."

Later, White House press secretary Sarah Sanders sought to clarify Trump's comments, saying his "no" meant that he was not taking any questions from reporters.

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